This step by step diy project is about 16×20 lean to shed roof plans. This is PART 2 of the large shed plans, where I show you how to build the lean to roof. In order to build the roof, you need to use 2×10 lumber for the rafters and 3/4″ plywood for the roofing. Take a look over the rest of my woodworking plans, if you want to get more building inspiration.
When buying the lumber, you should select the planks with great care, making sure they are straight and without any visible flaws (cracks, knots, twists, decay). Investing in cedar or other weather resistant lumber is a good idea, as it will pay off on the long run. Use a spirit level to plumb and align the components, before inserting the galvanized screws, otherwise the project won’t have a symmetrical look.
Projects made from these plans
16×20 Lean to Shed Roof Plans
- G – 2 pieces of T1-11 siding – 48″x45″ long, 2 pieces – 48″x36″ long, 2 pieces – 48″x27″ long, 2 pieces – 48″x18″ long SIDING
- G – 2 pieces of 2×4 lumber – 25″ long, 2 pieces – 16 1/4″ long, 2 pieces – 2 1/4″ long SUPPORTS
- I – 16 pieces of 2×10 lumber – 220″ long RAFTERS
- J – 2 pieces of 2×10 lumber – 220″ long, 7 pieces – 8 1/4″ long 2xOVERHANG
- K – 4 pieces of 3/4″ plywood – 12″x96″ long, 2 pieces – 12″x28″ long, 8 pieces – 48″x96″ long, 4 pieces – 48″x48″ long, 2 pieces – 28″x96″ long, 1 piece – 28″x48″ long ROOF
- L – 2 pieces of 1×12 lumber – 220″ long, 2 pieces – 132 3/4″ long TRIMS
- M – 450 sq ft of tar paper, 450 sq ft of asphalt shingles ROOFING
- 3 pieces of T1-11 siding – 4’x8′
- 1 piece of 2×4 lumber – 8′
- 21 pieces of 2×10 lumber – 20′
- 14 pieces of 3/4″ plywood – 4’x8′
- 4 pieces of 1×12 lumber – 10′
- 4 pieces of 1×12 lumber – 12′
- 450 sq ft of tar paper, 450 sq ft of asphalt shingles
- tar paper
- rafter ties
- 6d nails, 2 1/2″ screws, 3 1/2″ screws
- wood filler , wood glue, stain/paint
16×20 Lean to Shed Roof Plans
Next, you need to build the rafters for the 16×20 lean to shed. Mark the cut lines on the 2×10 boards and then get the job done with a saw. Smooth the edges with sandpaper so you get a professional result.
Fit the rafters to the top of the shed structure, every 16″ on center. Use rafter ties to lock the trusses to the top plates tightly.
Use 2×4 lumber for the side supports. Use a saw to make an angled cut at one end of the supports. Drill pocket holes at both ends of the supports and then secure them into place with 2 1/2″ screws. Make sure the corners are right-angled, for a professional result.
Fit the T1-11 siding sheets to the side walls of the storage shed. Mark the cut lines on the sheets and get the job done with a saw. Use 6d nails, every 8″ along the framing.
Use 2×10 lumber for the side overhangs. You can adjust the size of these overhangs by making the blockings longer or shorter. Drill pilot holes through the beams and insert 3 1/2″ screws into the blockings.
Fit the overhangs to the sides of the of the shed. Align the edges with attention, drill pilot holes and insert 2 1/2″ screws to lock them into place tightly.
Cut the sheets for the roof from 3/4″ plywood and then fit them to the top of the shed. Align the edges with attention, drill pilot holes and insert 1 5/8″ screws, every 8″ along the rafters. Start installing the sheets from the bottom left up. Leave no gaps between the sheets.
Use 1×12 lumber for the side roof trims. Align the edges with attention and insert 2 1/2″ screws to lock them into place tightly.
Fit the 1×12 trims to the front and back of the roof. Align the edges with attention and then insert 2 1/2″ screws to lock them into place tightly.
Cover the roof with tar paper and then install the asphalt shingles. Make sure you also install the appropriate drip edges, so you can seal the shed roof. Read the manufacturer’s instructions for a tight fit.
Last but not least, you need to take care of the finishing touches. Fill the holes with wood putty and then smooth the surface with 120-220 grit sandpaper. Apply a few coats of paint or stain over the components to protect the shed from the weather elements and to enhance the look of the shed.
I have lots of other shed projects on the site so I recommend you to browse through all alternatives before starting the building project. See all my shed projects HERE. Moreover, check out PART 1 of the shed, so you learn how to build the frame of the shed. Check out PART 3 of the shed project, so you learn how to build the double doors.
This woodworking project was about 16×20 lean to shed roof plans free. If you want to see more outdoor plans, check out the rest of our step by step projects and follow the instructions to obtain a professional result.